US2224480A - Centering device - Google Patents
Centering device Download PDFInfo
- Publication number
- US2224480A US2224480A US301665A US30166539A US2224480A US 2224480 A US2224480 A US 2224480A US 301665 A US301665 A US 301665A US 30166539 A US30166539 A US 30166539A US 2224480 A US2224480 A US 2224480A
- Authority
- US
- United States
- Prior art keywords
- centering device
- drill
- section
- shank
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B49/00—Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored
- B23B49/02—Boring templates or bushings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/55—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
- Y10T408/557—Frictionally engaging sides of opening in work
- Y10T408/558—Opening coaxial with Tool
- Y10T408/5583—Engaging sides of opening being enlarged by Tool
Definitions
- This invention relates to an improved centering device for drill bits, and the primary object of the invention is to provide a novel bit attachment adapted to accurately center a hole formed by a bit in a piece of iWork, relative to a countersunk opening in a member attached to the work.
- a more specic object of the present invention is to provide a bit attachment of the above kind which may be readily applied to a drill bit, and
- a still further object of the present invention is to provide a centering device of the above kind which is simple in construction, durable, and
- Figure 1 is an elevational view of a drill bit equipped with a centering device constructed in accordance with the present invention.
- Figure 2 is a longitudinal sectional view thereof taken on line 2- 2 of Figure 1.
- Figure 3 is atop plan view of the same; and Figure 4 is a transverse section online @-4 of Figure 1.
- the pres- 3o ent centering device comprises a tubular member through which the conventional drill D is adapted to be directed, and which is preferably composed of an upper section 5 whose lower end is in the form of an internally threaded cap 6.
- the remaining portion of the upper section 6 is in the nature of a reduced shank l rigid with and projecting upwardly. lfrom the cap portion 6 and split longitudinally at a plurality of points as at 8.
- the shank l is adapted for reception in:
- the centering device further includes an intermediate section 9 in the form of a cylinder having anopen upper end threadedinto the cap portion 6 of the upper section and provided with abottom wall having a 'central opening at I0.
- the centering device further includes a lower section II slidable through the bottom opening I0 of the intermediate section 9 and having an 55 external annular ange ,I2 at the top thereof (Cl. T1-55) arranged to abut the bottom wall of the intermediate section 9 to limit the downward movement of the lower section II under the iniiuence of a helical compression spring I3 arranged in the intermediate section 9 and having its ends 5 respectively abutting the top wall of the cap portion 6 of the upper section 5 and the upper end of the lower section II.
- the lower section lII is yieldingly projected substantially ush with the lower end of the drill D, and 10 the lower end of the lower section II is tapered or of conical form as at I4 to provide a nose adapted to enter the countersunk opening of a member and thereby direct the drill bit D perpendicularly to this member precisely at the cen- 15 ter of the countersunk opening.
- the drill bit D when used to form an opening in the work, such opening will be accurately centered with respect .to the countersunk opening of the member referred to, the lower section II of the 20 centering device receding as the drilling proceeds as permitted by the spring I3;
- the lower and intermediate sections II and 9 are provided in the sides with openings I5 and I6, respectively to permit the escape of drilling outwardly there- 25 through in case the same should nd their way l into said sections II and 9 of the device.
- the present invention will be found of great value when it is desired to fasten a-metal plate onto a backing by screws, which plate is drilled 30 and provided with proper countersinks for the screw heads.
- screws which plate is drilled 30 and provided with proper countersinks for the screw heads.
- the device acts as a guide which braces the drill bit against deiiection and breakage. Also, by varying the position of the drill bit longitudinally with respect to the device, the latter will act to regulate the depth of drilling. y
- a centering device for drill bits comprising 'a tubular member through which the drill bit is adapted to be directed, said tubular member comprising an upper section reduced at its upper end to provide a shank, and a spring projected .lower section having a conical lowerV end ⁇ providing a nose adapted to enter a countersunk opening with which an opening to beformed by the .drill is adapted to bel centered, said-shank being split longitudinally so as to be capable of compression whereby the centering device and drill may be secured in a chuck at a single operation, said uppersection consisting of an in- 4ternally threaded cap having the shank rigid cap portion and the top of said lower section.
- a centering device for drill bits comprising a tubular member through which the drill bit is adapted to be directed, said tubular member comprising an upper section reduced at its upper end to provide a shank, a spring projected lower section having a conical lower end providing ⁇ a lnose adapted to entera countersunk opening with which an opening to belformed by the drill is adapted to be centered, said shank being split longitudinally so as to be'capable of compression whereby the centering device and drill may be secured in a chuck ⁇ at a single operation, said upper section consisting of an internally threaded caphaving the shank rigid with and project- -ing upwardly therefrom, a cylindrical intermediate section threaded into said cap at its upper end and havinga central opening in Ithe bottom thereof through which the lower section slidably projects, said lower section having' an external y annular iiange on the upper end thereof. ar-
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Description
Dec. 10, 1940. J. KARTARIK CENTERING DEVICE' v Filed ot. 2'?, 195s Patented Dec. 10, 1940 UNITED sTATEs PATENT OFFICE CENTERING DEVICE Joseph Kartarik, St. Paul, Minn. Application October 27, 1939, Serial No. 301,665
2 Claims.
This invention relates to an improved centering device for drill bits, and the primary object of the invention is to provide a novel bit attachment adapted to accurately center a hole formed by a bit in a piece of iWork, relative to a countersunk opening in a member attached to the work.
A more specic object of the present invention is to provide a bit attachment of the above kind which may be readily applied to a drill bit, and
which may be eiectively clamped, together with the drill bit, Within the chuck of a brace at a single operation.
A still further object of the present invention is to provide a centering device of the above kind which is simple in construction, durable, and
eiiicient in use.
Other objects of the present invention will become apparent from the following description when considered in connection with the accompanying drawing, inwhich:
Figure 1 is an elevational view of a drill bit equipped with a centering device constructed in accordance with the present invention.
Figure 2 is a longitudinal sectional view thereof taken on line 2- 2 of Figure 1.
Figure 3 is atop plan view of the same; and Figure 4 is a transverse section online @-4 of Figure 1.
Referring in detail to-the drawing, the pres- 3o ent centering device comprises a tubular member through which the conventional drill D is adapted to be directed, and which is preferably composed of an upper section 5 whose lower end is in the form of an internally threaded cap 6. The remaining portion of the upper section 6 is in the nature of a reduced shank l rigid with and projecting upwardly. lfrom the cap portion 6 and split longitudinally at a plurality of points as at 8. The shank l is adapted for reception in:
4 the chuck of an ordinary brace, and by splitting the shank as at 8, said shank is capable of compression under the inuence of the Jaws of the brace chuck for effecting the equipped clamping action of the shank 'l upon the drill D, whereby said drill and the centering device may be locked in the chuck at a single operation.
The centering device further includes an intermediate section 9 in the form of a cylinder having anopen upper end threadedinto the cap portion 6 of the upper section and provided with abottom wall having a 'central opening at I0. The centering device further includes a lower section II slidable through the bottom opening I0 of the intermediate section 9 and having an 55 external annular ange ,I2 at the top thereof (Cl. T1-55) arranged to abut the bottom wall of the intermediate section 9 to limit the downward movement of the lower section II under the iniiuence of a helical compression spring I3 arranged in the intermediate section 9 and having its ends 5 respectively abutting the top wall of the cap portion 6 of the upper section 5 and the upper end of the lower section II. In this way, the lower section lII is yieldingly projected substantially ush with the lower end of the drill D, and 10 the lower end of the lower section II is tapered or of conical form as at I4 to provide a nose adapted to enter the countersunk opening of a member and thereby direct the drill bit D perpendicularly to this member precisely at the cen- 15 ter of the countersunk opening. Thus, when the drill bit D is used to form an opening in the work, such opening will be accurately centered with respect .to the countersunk opening of the member referred to, the lower section II of the 20 centering device receding as the drilling proceeds as permitted by the spring I3; The lower and intermediate sections II and 9 are provided in the sides with openings I5 and I6, respectively to permit the escape of drilling outwardly there- 25 through in case the same should nd their way l into said sections II and 9 of the device.
The present invention will be found of great value when it is desired to fasten a-metal plate onto a backing by screws, which plate is drilled 30 and provided with proper countersinks for the screw heads. AIn order that the screws shall have their heads rest flush with the surface of the plate when they are screwed home, it is necessary that the screws be started exactly in the 35 center of the countersunk hole, as well as accurately perpendicularly to the plate. Otherwise, the head or one side thereof would project above the plate. By means of the present attachment,
' this true centering can be readily and accurately 40 performed without depending upon the skill and vjudgment of thevmechanic. 'I'he device is extremely simple, convenient to use, and efcient. While I have shown what I believe to be a preferred -embodiment of the present invention, it 45 Vwill-be understood that the same is capable of l various modifications and changes in specic details of construction. i y
While the main purpose of the present inven- 50 tionis to center a drill bit as above described; it will be noted that the device acts as a guide which braces the drill bit against deiiection and breakage. Also, by varying the position of the drill bit longitudinally with respect to the device, the latter will act to regulate the depth of drilling. y
What I claim as new is: 1. A centering device for drill bits comprising 'a tubular member through which the drill bit is adapted to be directed, said tubular member comprising an upper section reduced at its upper end to provide a shank, and a spring projected .lower section having a conical lowerV end` providing a nose adapted to enter a countersunk opening with which an opening to beformed by the .drill is adapted to bel centered, said-shank being split longitudinally so as to be capable of compression whereby the centering device and drill may be secured in a chuck at a single operation, said uppersection consisting of an in- 4ternally threaded cap having the shank rigid cap portion and the top of said lower section.
2. A centering device for drill bits comprising a tubular member through which the drill bit is adapted to be directed, said tubular member comprising an upper section reduced at its upper end to provide a shank, a spring projected lower section having a conical lower end providing` a lnose adapted to entera countersunk opening with which an opening to belformed by the drill is adapted to be centered, said shank being split longitudinally so as to be'capable of compression whereby the centering device and drill may be secured in a chuck `at a single operation, said upper section consisting of an internally threaded caphaving the shank rigid with and project- -ing upwardly therefrom, a cylindrical intermediate section threaded into said cap at its upper end and havinga central opening in Ithe bottom thereof through which the lower section slidably projects, said lower section having' an external y annular iiange on the upper end thereof. ar-
ranged to abut the bottom o'f the intermediate Isection to limit the projection of said lowerfsection, and a helical compression spring` arranged in the intermediate section and having its ends respectively bearing against said cap portion and the top of said lower section, said lower and intermediate sections having openings through the sides thereof for the escape of drilling.
- JOSEPH KARTARIK
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US301665A US2224480A (en) | 1939-10-27 | 1939-10-27 | Centering device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US301665A US2224480A (en) | 1939-10-27 | 1939-10-27 | Centering device |
Publications (1)
Publication Number | Publication Date |
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US2224480A true US2224480A (en) | 1940-12-10 |
Family
ID=23164332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US301665A Expired - Lifetime US2224480A (en) | 1939-10-27 | 1939-10-27 | Centering device |
Country Status (1)
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Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2453825A (en) * | 1945-04-05 | 1948-11-16 | Wright Samuel Bailey | Tailstock lathe for drilling |
US2547915A (en) * | 1948-07-28 | 1951-04-03 | Cgs Lab Inc | Grooving tool |
US2612793A (en) * | 1950-11-17 | 1952-10-07 | Robert F Krainz | Hole spacing and centering device |
US2788684A (en) * | 1953-04-08 | 1957-04-16 | John H Scharf | Drilling jig |
US2792726A (en) * | 1953-05-04 | 1957-05-21 | Selmer E Vick | Self-centering bit |
US3027785A (en) * | 1960-09-09 | 1962-04-03 | Norfolk Products Corp | Drill and centering device |
US3129614A (en) * | 1961-12-22 | 1964-04-21 | Sundstrand Corp | Tool guide |
US4969781A (en) * | 1989-04-07 | 1990-11-13 | The B. F. Goodrich Company | Blind fastener hand tool |
US4995434A (en) * | 1989-08-08 | 1991-02-26 | Christiansen Clead M | Woodworking lathe tailstock assembly |
EP0460447A1 (en) * | 1990-06-06 | 1991-12-11 | Synthes AG, Chur | Compression drill guide |
US5509762A (en) * | 1995-03-16 | 1996-04-23 | Fredricksen; Robert L. | Drill bit centering device |
US5649793A (en) * | 1995-05-25 | 1997-07-22 | Ericksen; Colin W. | Self centering drilling tool |
US5779404A (en) * | 1994-05-02 | 1998-07-14 | Jore; Matthew B. | Reversible drill/driver tool |
US6302409B1 (en) * | 1999-09-10 | 2001-10-16 | Gunter Emil Gutsche | Elements for a magnetic tool holder system |
US6488452B1 (en) | 1999-08-12 | 2002-12-03 | Vermont American Corporation | Drill and drive apparatus having arrangement to accommodate long drill bits |
US6761361B2 (en) | 2002-08-09 | 2004-07-13 | Credo Technology Corporation | Drill and drive apparatus with improved tool holder |
US20060099040A1 (en) * | 2004-11-11 | 2006-05-11 | Mathis Dennis R | Adjustable drill microstop with multiple offset depth settings |
US20070041799A1 (en) * | 2005-08-22 | 2007-02-22 | Schaefer Robert H | Tap safety cover |
US20070118146A1 (en) * | 2005-11-23 | 2007-05-24 | Stryker Trauma S.A. | Compression instrument |
US20150023747A1 (en) * | 2013-07-18 | 2015-01-22 | Airbus Operations Gmbh | Head unit, stop holder and method for stabilizing a drilling machine |
US9095947B1 (en) * | 2012-05-22 | 2015-08-04 | The Boeing Company | Sensing tip reamer |
WO2019210915A1 (en) * | 2018-04-30 | 2019-11-07 | Mueller Uwe | Device for removing broken-off dart tips |
-
1939
- 1939-10-27 US US301665A patent/US2224480A/en not_active Expired - Lifetime
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2453825A (en) * | 1945-04-05 | 1948-11-16 | Wright Samuel Bailey | Tailstock lathe for drilling |
US2547915A (en) * | 1948-07-28 | 1951-04-03 | Cgs Lab Inc | Grooving tool |
US2612793A (en) * | 1950-11-17 | 1952-10-07 | Robert F Krainz | Hole spacing and centering device |
US2788684A (en) * | 1953-04-08 | 1957-04-16 | John H Scharf | Drilling jig |
US2792726A (en) * | 1953-05-04 | 1957-05-21 | Selmer E Vick | Self-centering bit |
US3027785A (en) * | 1960-09-09 | 1962-04-03 | Norfolk Products Corp | Drill and centering device |
US3129614A (en) * | 1961-12-22 | 1964-04-21 | Sundstrand Corp | Tool guide |
US4969781A (en) * | 1989-04-07 | 1990-11-13 | The B. F. Goodrich Company | Blind fastener hand tool |
US4995434A (en) * | 1989-08-08 | 1991-02-26 | Christiansen Clead M | Woodworking lathe tailstock assembly |
EP0460447A1 (en) * | 1990-06-06 | 1991-12-11 | Synthes AG, Chur | Compression drill guide |
US5507801A (en) * | 1990-06-06 | 1996-04-16 | Synthes (U.S.A.) | Compression drill guide |
US5779404A (en) * | 1994-05-02 | 1998-07-14 | Jore; Matthew B. | Reversible drill/driver tool |
US5509762A (en) * | 1995-03-16 | 1996-04-23 | Fredricksen; Robert L. | Drill bit centering device |
US5649793A (en) * | 1995-05-25 | 1997-07-22 | Ericksen; Colin W. | Self centering drilling tool |
US6488452B1 (en) | 1999-08-12 | 2002-12-03 | Vermont American Corporation | Drill and drive apparatus having arrangement to accommodate long drill bits |
US6302409B1 (en) * | 1999-09-10 | 2001-10-16 | Gunter Emil Gutsche | Elements for a magnetic tool holder system |
US6761361B2 (en) | 2002-08-09 | 2004-07-13 | Credo Technology Corporation | Drill and drive apparatus with improved tool holder |
US20060099040A1 (en) * | 2004-11-11 | 2006-05-11 | Mathis Dennis R | Adjustable drill microstop with multiple offset depth settings |
US7261499B2 (en) * | 2004-11-11 | 2007-08-28 | The Boeing Company | Adjustable drill microstop with multiple offset depth settings |
US20070041799A1 (en) * | 2005-08-22 | 2007-02-22 | Schaefer Robert H | Tap safety cover |
US20070118146A1 (en) * | 2005-11-23 | 2007-05-24 | Stryker Trauma S.A. | Compression instrument |
US7704257B2 (en) * | 2005-11-23 | 2010-04-27 | Stryker Trauma S.A. | Compression instrument |
US9095947B1 (en) * | 2012-05-22 | 2015-08-04 | The Boeing Company | Sensing tip reamer |
US20150023747A1 (en) * | 2013-07-18 | 2015-01-22 | Airbus Operations Gmbh | Head unit, stop holder and method for stabilizing a drilling machine |
US9610639B2 (en) * | 2013-07-18 | 2017-04-04 | Airbus Operations Gmbh | Head unit, stop holder and method for stabilizing a drilling machine |
WO2019210915A1 (en) * | 2018-04-30 | 2019-11-07 | Mueller Uwe | Device for removing broken-off dart tips |
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